Ref Causing "This Entry Is Invalid" with no explanation

[Sean_Conerly]

I have a dashboard with two views. A slice view where a single column is referenced in the sheet table with a ValidIf expression that references the unique values in a column of that sheet table. That column should be used to filter data in the second table view below. However, when anything is selected in the first view, it just shows yellow triangles and red writing below that says “This Entry Is Invalid”. (Which is impossible because its pulling unique values from the same table used in the second view.) And also that able below remains unfiltered. Please help.